Driving-wheel lathe



Nov. 2 1926- 1,604,962

- G. H. BENZON. JR

DRIVING WHEEL LATHE l Filed Dec. a 1925 1 3 Sheets-Sheet 1 1926. 1 604,962 Nov 2 G. H. BENzoN, JR

DRIVING WHEEL LATHE Filed Dec. 8 3,925 3 Sheets-Sheet 2 Nov. 2 1926. 1,604,962

G. H. BENZON` JR DRIV ING WHEEL LATHE Filed Das. s, 19'25 3 Sheets-Sheet 5 Wir/(Essa I Geary@ 6,707?,

Patented Nov. E, e

conformaron or tfnnnstrnvnnraf salvate-.waere Les@ My invention relates to au improvement in Wheel lathes, and more especially in that type of Wheel lathe adapted "to accommodate locomotive driving` Wheels. y i

Drivingl Wheel lathes, as is Well known, are required tok accommodate the driving Wheels of locomotives.l in Which the end oic the kaxle is flush with the hubs, and also the trailer Wheels, in vvhichthe en'ds of the axle extend beyond the outer faces of the Wheels.

In lathes Voit the character indicated, the Wheels to be machined are vnfiotmted in the lathe between centers, carried, on sliding:

spindles which engage the ends of the.' axle. The Wheels are driven by face plates, be tiveen which the Wheels are supported by the centers and to which the Wheels are secured by clamps. In order to facilitate clamping the Wheels to the Hiace plates and to effect an etlicient drive oi the v vheels from the plates, the distance from the outside of the Wheel rims to the face plates is desirably practically the same inthe case of both driving Wheelsy and trailer Wheels.

ln the mounting of driving Wheels in the lathe, the centers are required tol extend beyond the iace plates, since the Wheels are spaced therefrom and the ends of the axle' engaged by the centers are flush With the Wheel hubs. On the other hand, in the mounting of trailer Wheels in the lathe, the centers are required to be Withdrawn, since the ends of the axle ,extend beyond Vthe Wheels, and it the Wheels be spaceddesirably vtrom the *face plates, the ends ot the axle extend lclose to, and 'in some cases beyond, the outer faces of the plates.

In order to accommodate both driver and trailer Wheels, it is necessary to provide a support for thesliding spindles which carry the centers, xvhenthey are in advanced position for the support of driving Wheels, and to provide means tor retracting the spindles and centers and permitting extension `of .the ends of the axleV close to, or beyond,.,tlie outerfsuriace of the face plates, when trailer Wheels are supported. l v

Heretofore, in the usual lathe construction, there has been provided atlanged outboard bearing, centeredlby and-bolted to each of the tace plates, tl^`uoughV which the spin dies ycarrying' the centers project and by which they are supported4 in advanced position.A `"llhese outboard' bearings are heavy and cumbersome and usually a hoist or crane' which are carried by the 'face plates Whetherl in use ornot, and which can readily be swung into operative position by the lathe hand for turningdrivers orisivung into operative position by him for turning'trailer'vvheels, with out the use of ahoist. This is accomplished by hinging the bearing` to the face plate and providing' a conical'seat for the bearing` in the center of the face plate anda frustro conical projection on the inner 'faceaof the bearingivhi'ch is `arranged to engage the conical seat When the bearing is swung'into spindle supporting position on the face plate, which is vthen secured .to Athe face plate by means of bolts.

`Ilfaving novv indicated, in a general Way, the nature and vpurpose 01": my invention, I

Will proceed to a. detailed description there of, Y v vith reference to the accompanying drawings, in which there is illustrated a'prel terred embodiment, and in which :l-

Fig. l isa sidevvieW of a part of a driving Wheel lathe, embodying iny invention, set up for the support of a pair of driving Wheels. Fig. 2 is a vievv of the subject ot Fig. l. partly in section, set up .for the support ot a pair oftrailer Wheels.

3 is a partial tace view 'of a face plate. Fig. 4 is principally a section of Fig. In theseveral igures, ct represents `the bed of a driving Wheel latheprovided with tace plates Z2, between which are adapted to be n nour'ited the Wheels to Ube machined.J

The face plates t) are adapted toy be driven by suitably driven hollow spindles c l`mountedin housings l and through which extend the spindles 'at carrying the centers' e, adapted to engage kthe ends of the axle carrying the driving vvheelsgorthe ends of the axle 'Zt -carryingthe 'trailerivheelszl rlh'e Wheels g are'secured tothe face plates by means of clamps The-faceplates are eachprovide'd centrally ivith a`b'or'e lf'tor the accommodation ofthe extended ends of the traileijtvheel axle hthe' outer ends :ot'rvliich apertures are tai'ilered." The .face plates are also each provided Avfitlg. a recess .mztor thev accommodation n eine, i

GEORGE BENZQNrJfR, 0,3 JEWQNEQWN, PENNSYLVANI, ASSEGNOR TO; WILLIAM snLLnns a contrarier, nconronarnn, onrrrnannnrnia, rnNNsYLVAN'IA, A

of the cranlr pins carried by the driving wheels g when such wheels are turned and are also adapted to receive the outboard bearings when turning trailers as hereinafter described.

Each of the fac-e plates is provided with an outboard bearing n for the support of the spindles when the centers are advanced, beyond the outer face of the faceplates, for engagement with the ends ot the driving wheel axle f, as shown in Figure l. The outboard bearings n are pivotally secured, by means of pins 0, to brackets p bolted to the tace plates and are adapted to be swung into and out of line with the centers e.

These outboard bearings are provided with flanges through which the securing bolts pass, the inner Jfaces of which anges engage their respective face plates. The inner faces of the outboard bearings are provided with frustro-conical portions which engage seats formed by the tapered outer portions of the bores lo in the tace plates. The axis of the hinge pins are so positioned relative to the tapered seats and the frustro-conical portions on the outboard bearings as Well as the recesses m, so as to properly position the outboard bearings in the tace plate when said bearings are swung into driver turning position and to permit them to be swung into the recesses m when said bearings are in trailer turning position.

When theoutboard bearings n are to be utilized for the support of lthe spindles when the centers are advanced to turn drivers. as .shown in Figure l, they are bolted to the face plates by means ot bolts g, being centered in line with the spindles by the projection of their irustro-conical portions into the bores k, as clearly shown in Fig. 4.

When it is desired that the outboard bearings a be removed to permit the accommodation of the ends of the trailer wheel axle it, as shown in Figure 2, the tace plates are turned to bring the pins yo into a vertical position, the bolts q are removed and the bearings swung on the pins 0 until their forward ends enter the recesses m, in which position they are held by means of clamps r, carried in radial slots in the face plates.

The advantages of my invention result from the provision ot outboard bearings for the center supporting spindles which are so hinged to the tace plates that the said bear*- ings can readily be swung into spindle supporting position Jfor turning drivers or into position to permit entrance of the protruding ends of trailer axles into the bores in the face plates, with no more eiort than is required to overcome the Jfriction ot the hinges on which thesaid bearings aresupported. A further advantage of my invention Aarises from the provision 'of seats in the face plate for the receptionof frustro-conica-l portions on the outboard bearings which are arranged to center said bearings when the said bearings are swung into spindle supporting position in the face plate, together with hinge pins so positioned on the face plate relative to the above mentioned seats and the crank pin l. A lathe having a pair of face plates,a

pair of longitudinally movable spindles for supporting turning centers and arranged to be extended beyond the tace plates, outboard bearings i'or the spindles pivotally mounted on the face plates and arranged to be swung into spindle supporting position or into nonsupporting position. f, p

2. A lathe having a pair of face plates, a pair of longitudinally movable spindles for supporting turning centers and arranged to be extended beyond the face plates, outboard bearings swingable about a center into and out of position to support the spindles and means for centering the bearings relative to the spindleswhen the bearings are swung into spindle supporting position.

3. A lathe having a pair of face plates, a pair of longitudinally movable Vspindles for supporting turning centers and arranged to be extended beyond the face plates, and bearings vpivotally mounted on the tace plates and swingable into and out of spindle supporting position, there being -tapered seats in the face plates concentric with the spindles, frustro-conical portions on the bearings arranged to engage the seats when the bearings are swung into spindle supporting position, and means for securing said-bearings to the face plates in either position.

4;. A lathe for turning locomotive wheels mounted on their axles, having a pair of tace plat-es mounted for rotation,` a turning center supporting spindle arranged to be moved along the axis of each face plate, there being an axle-receiving recess in each face plate concentric with the axis thereof, and a second recess in each tace plate 'for the reception of a locomotive driving wheel crank pin,'an

outboard bearing pivotally mounted on `each face plate for supporting a center supporting spindle when 1n one position for turning driver wheels and arranged to be swung into the second recess in the face plate when turning trailer wheels, and means for se` curing the said bearings to the tace plates in either position.

5. A lathe for turning locomotive wheels mounted on their axles, having a pair of face plates mounted for rotation, a turning center supporting spindle arranged to be moved along Vthe axis of each face plate, there being an axle-receiving recess in each tace plate concentric With the axis thereof, and a second recess in each face plate for the reception of a locomotive driving Wheel crank pin, an outboard bearing pivotally mounted on each fece. plate for supporting a center supporting` spindle when in one position for turning' driver Wheels, there being tapered centering means on said bearings and face plates for centering the bearings when swung into suoli i0 position, said pivots also being arranged to permit said bearings to be swung int-o the second recess in the face plate when turning; trailer wheels, and means for securing the said bearings to the faceplates in either posit-ion.

In testimony of Which invention, I have hereunto set my hand, at Philadelphia, Pennsylvania, on this December 5th, 1925.

GEORGE H. BENZON, Jn. 

